Hello,
this is my problem : I've got cca 40 sinusoidal waves ( e.g. 0.118149
Cos[25.1013 t]) and after superposition I get irregurar wave record.
I'm trying to see how many waves I have in certain interval by finding
how many zero crossings there are:
Reduce[Total[Subscript[\[Eta], i]] == 0 && 0 < t < 60, t]
but I couldn't because "Reduce was unable to solve the system with
inexact coefficients"
What's the problem? What does it mean?
Can I find intersection between my wave and x-axis in any other wave?
Perhaps graphically ?
Thank you,
student Desana